// Create a CServiceConfig object.
HRESULT hr = CoCreateInstance(CLSID_CServiceConfig, NULL, CLSCTX_INPROC_SERVER, 
  IID_IUnknown, (void**)&pUnknownCSC);
if (FAILED(hr)) throw(hr);

// Query for the IServiceInheritanceConfig interface.
hr = pUnknownCSC->QueryInterface(IID_IServiceInheritanceConfig, 
  (void**)&pInheritanceConfig);
if (FAILED(hr)) throw(hr);

// Inherit the current context before using transactions.
hr = pInheritanceConfig->ContainingContextTreatment(CSC_Inherit);
if (FAILED(hr)) throw(hr);

// Query for the IServiceTransactionConfig interface.
hr = pUnknownCSC->QueryInterface(IID_IServiceTransactionConfig, 
  (void**)&pTransactionConfig);
if (FAILED(hr)) throw(hr);

// Configure transactions to always create a new one.
hr = pTransactionConfig->ConfigureTransaction(CSC_NewTransaction);
if (FAILED(hr)) throw(hr);

// Set the isolation level of the transactions to ReadCommitted.
hr = pTransactionConfig->IsolationLevel( 
  COMAdminTxIsolationLevelReadCommitted);
if (FAILED(hr)) throw(hr);

// Set the transaction time-out to 1 minute.
hr = pTransactionConfig->TransactionTimeout(60);
if (FAILED(hr)) throw(hr);